CN110451877A - A kind of building waste concrete-brick mixing self-repair concrete and preparation method thereof - Google Patents
A kind of building waste concrete-brick mixing self-repair concrete and preparation method thereof Download PDFInfo
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- CN110451877A CN110451877A CN201910693198.9A CN201910693198A CN110451877A CN 110451877 A CN110451877 A CN 110451877A CN 201910693198 A CN201910693198 A CN 201910693198A CN 110451877 A CN110451877 A CN 110451877A
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- regeneration
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention discloses a kind of building waste concrete-brick mixing self-repair concretes and preparation method thereof, the raw material for preparing of the self-repair concrete includes concrete and selfreparing regeneration concrete-brick mixture, by volume percentage, selfreparing regeneration concrete-brick mixture accounts for the 15%~45% of self-repair concrete；The volume ratio of selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1~4:1~3；The selfreparing regenerated coarse aggregate is made of regenerated coarse aggregate dipping Bacillus pasteurii bacterium solution, and the selfreparing regeneration brick aggregate is made of regeneration brick aggregate dipping Bacillus pasteurii bacterium solution；The OD value of Bacillus pasteurii bacterium solution is 1~1.3；By mass percentage, the quality volume of Bacillus pasteurii bacterium solution accounts for the 0.065% of regenerated coarse aggregate, and the quality volume of Bacillus pasteurii bacterium solution accounts for the 0.085% of brick aggregate.Have the advantages that repair efficiency height, be conducive to construction refuse resource application.
Description
Technical field
The invention belongs to intelligent building field of material technology, especially a kind of building waste concrete-brick mixing selfreparing coagulation
Soil and preparation method thereof.
Background technique
With the continuous development of Urbanization in China, a large amount of old buildings remove the surprising building rubbish of brought number
Rubbish, ecological environmental protection problem become increasingly conspicuous.It is counted according to the whole country, by the total building castoff storage in China in 2018 up to 30
Hundred million tons, it is contemplated that arriving the year two thousand twenty China building waste total amount will be more than 5,000,000,000 tons.And traditional land-fill method, not only economic cost
Height, while the landfill of building waste brings secondary pollution to soil and groundwater resources again.The thick bone of regeneration in building waste
Material and brick occupy significant proportion, and after broken, screening, classification, the mixture of the two is difficult to further under the prior art
It is completely separated, practical application is caused to be obstructed.The present invention utilizes recycled aggregate surface layer old mortar and the porous characteristic of brick aggregate itself,
Changing mushy disadvantage is to be easy to the advantage of microorganism carrier, is that building waste concrete-brick mixed microorganism mineralising deposits selfreparing
Concrete provides good association schemes.
Building waste concrete-brick mixing self-repair concrete has cracking self-excitation reparation, and environment resistant aggressivity is good, and intensity is high
The characteristics of, on the other hand on the one hand building waste that the proposition of the type concrete material has received number surprising solves natural
The bottleneck problem of aggregate resources shortage, and again need not further separate recycled aggregate and brick in process of production, both reduced
Production cost, also gets rid of production technology bottleneck problem instantly, while solving that economic, environmental protection, technology is triple needs instantly
The problem urgently solved.Though its research purpose is currently, existing scholar expands research to recycled aggregate combination microorganism
Improve aggregate interface performance using the reaction of microbiological precipitation of CaCO 3, these researchs and Research Thinking of the invention and preparation
Method has essential difference.In addition, being mixed with certainly using connected applications regenerated coarse aggregate interface and brick aggregate porosity characteristic
The research for repairing concrete has not been reported.
Summary of the invention
The purpose of the present invention is to provide a kind of concrete-bricks using in building waste as raw material, and has and repair efficiency height, ring
Border friendly is strong, durability is good, intensity is high in life cycle management, conducive to construction refuse resource application self-repair concrete and
Preparation method.
To achieve the above object, the invention adopts the following technical scheme:
A kind of building waste concrete-brick mixing self-repair concrete, which is characterized in that the preparation of the self-repair concrete is former
Material includes that concrete and selfreparing regenerate concrete-brick mixture, and by volume percentage, selfreparing regeneration concrete-brick mixture is accounted for certainly
Repair the 15%~45% of concrete；
The selfreparing regeneration concrete-brick mixture is the mixing of selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate
The volume ratio of object, selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1~4:1~3；
The selfreparing regenerated coarse aggregate is made of regenerated coarse aggregate dipping Bacillus pasteurii bacterium solution, and described reviews one's lessons by oneself
Multiple regeneration brick aggregate is made of regeneration brick aggregate dipping Bacillus pasteurii bacterium solution；
The OD value of Bacillus pasteurii bacterium solution is 1~1.3；By mass percentage, the quality of Bacillus pasteurii bacterium solution
Volume accounts for the 0.065% of regenerated coarse aggregate, and the quality volume of Bacillus pasteurii bacterium solution accounts for the 0.085% of brick aggregate.
Optionally, by volume percentage, selfreparing regeneration concrete-brick mixture accounts for the 30% of self-repair concrete.
Optionally, the process of the dipping Bacillus pasteurii bacterium solution are as follows: regenerated coarse aggregate is in negative pressure of vacuum 0.6Mpa
Under the conditions of impregnate Bacillus pasteurii bacterium solution 45min, regeneration brick aggregate impregnates Pasteur's gemma under the conditions of negative pressure of vacuum 0.6Mpa
Bacillus bacterium solution 35min.
Optionally, the regenerated coarse aggregate is the metaling that concrete construction rubbish is formed after crushing；Regenerate thick bone
Expect that partial size is the rubble of 5~15mm, 2289~2631kg/m of apparent density3, crush index 15.0-19.0%, moisture content is
0.98~1.53%, water absorption rate is 3.40~4.10%；
The regeneration brick aggregate is the fragment of the material of brick in building waste, and regeneration brick aggregate size is 5~15mm, apparently
2150~2390kg/m of density3, crush index is 32.0~42.0%, and moisture content is 1.90~3.18%, water absorption rate 14.11
~16.31%.
Optionally, it counts in mass ratio, the ingredient mass ratio of the concrete is water: cement: sand: stone=0.39~
0.42:1.00~1.20:1.10~1.20:2.50~3.10.
Optionally, the cement is PO42.5 grades of portland cements, density 3100kg/m3；The fineness of the sand
Modulus is 3.0~2.3, and partial size is 0.23~0.50mm；The stone be rubble, 5~15mm of partial size, apparent density 2378~
2769kg/m3, crush index 11.0-13.0%, moisture content is 0.58~1.23%, and water absorption rate is 2.20~3.10%.
The preparation of a kind of preparation method of building waste concrete-brick mixing self-repair concrete, the self-repair concrete is former
Material includes that concrete and selfreparing regenerate concrete-brick mixture, and by volume percentage, selfreparing regeneration concrete-brick mixture is accounted for certainly
Repair the 15%~45% of concrete；The selfreparing regeneration concrete-brick mixture is selfreparing regenerated coarse aggregate and selfreparing
The volume ratio of the mixture of regeneration brick aggregate, selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1~4:1~3；Pasteur
The OD value of bacillus bacterium solution is 1~1.3, and by mass percentage, it is thick that the quality volume of Bacillus pasteurii bacterium solution accounts for regeneration
The 0.065% of aggregate, the quality volume of Bacillus pasteurii bacterium solution account for the 0.085% of brick aggregate；
The selfreparing regenerated coarse aggregate is made of regenerated coarse aggregate dipping Bacillus pasteurii bacterium solution, and described reviews one's lessons by oneself
Multiple regeneration brick aggregate is made of regeneration brick aggregate dipping Bacillus pasteurii bacterium solution；Regenerated coarse aggregate impregnates Bacillus pasteurii bacterium
The process of liquid are as follows: dipping absorption 45min, regeneration brick aggregate impregnate Bacillus pasteurii bacterium solution under the conditions of negative pressure of vacuum 0.6Mpa
Process are as follows: dipping absorption 35min under the conditions of negative pressure of vacuum 0.6Mpa.
Concrete is mixed to mix and stir to mix up to building waste concrete-brick with selfreparing regeneration concrete-brick mixture and reviews one's lessons by oneself compound
Solidifying soil.
Optionally, by volume percentage, selfreparing regeneration concrete-brick mixture accounts for the 30% of self-repair concrete.
Optionally, it counts in mass ratio, the ingredient mass ratio of the concrete is water: cement: sand: stone=0.39~
0.42:1.00~1.20:1.10~1.20:2.50~3.10；
The cement is PO42.5 grades of portland cements, density 3100kg/m3；The fineness modulus of the sand is
3.0~2.3, partial size is 0.23~0.50mm；The stone is rubble, 5~15mm of partial size, 2378~2769kg/ of apparent density
m3, crush index 11.0-13.0%, moisture content is 0.58~1.23%, and water absorption rate is 2.20~3.10%.
Optionally, the regenerated coarse aggregate is the metaling that concrete construction rubbish is formed after crushing；Regenerate thick bone
Expect that partial size is the rubble of 5~15mm, 2289~2631kg/m of apparent density3, crush index 15.0-19.0%, moisture content is
0.98~1.53%, water absorption rate is 3.40~4.10%；
The regeneration brick aggregate is the fragment of the material of brick in building waste, and regeneration brick aggregate size is 5~15mm, apparently
2150~2390kg/m of density3, crush index is 32.0~42.0%, and moisture content is 1.90~3.18%, water absorption rate 14.11
~16.31%.
Advantages of the present invention are as follows:
The present invention is solved in the past using the regenerated coarse aggregate and brick aggregate mixed carrier in building waste using other loads
When body, the problem that microbial activity activity is poor, carrier entirety mechanical strength is low, practical operation is complicated, cost of manufacture is high, together
When maximumlly reached construction refuse resource utilize and environment friendly advantage.
The present invention is described in further detail With reference to embodiment.
Detailed description of the invention
The XRD spectrum of microbe deposition product when Fig. 1 is vacuum impregnation regenerated coarse aggregate and brick aggregate；
Fig. 2 be 28d microbial mineralization self-repair concrete crack repairing effect comparison diagram (embodiment one to six, from a left side to
The right side is successively)；
Fig. 3 is the regenerated coarse aggregate of different addition quantity and the crack schematic diagram of brick aggregate test specimen；
Fig. 4 is that electron microscope repairs product schematic diagram (10000X) in embodiment one.
Specific embodiment
The invention will be further described below, it should be noted that, the present embodiment is provided premised on the technical program
Detailed embodiment and specific operation process, but the scope of the present invention is not limited to the present embodiment.
Coarse aggregate is exactly building stones in architecture field, is gathered materials because building stones and sand are all called, and building stones are coarse aggregates, because its
Effect is to play skeleton function in concrete, as human skeleton, so it is called coarse aggregate, and sand is then the seam for filling building stones
Gap, without skeleton function.Regenerated coarse aggregate is exactly from building stones obtained from concrete construction refuse breaking.Recycled aggregate and natural
Building stones be it is noncomparable, intensity is not achieved, and the application surface of recycled aggregate is also limited.It still applies in wall at present more, it is some
It can also use on the small highway of the auxiliary of urban cells, will not be used on super highway, and be disconnected in building frame structure
It is so obsolete.Recycled aggregate is applied to C30 or concrete grade below is more.The regenerated coarse aggregate that the present invention selects,
It is derived from concrete construction rubbish, is the building stones that the product formed after natural aggregate is condensed with cement base aquation is formed after crushing.
Therefore, regenerated coarse aggregate of the invention is that the solid waste concrete that will be discarded in building waste passes through jaw crushing
After crusher machine screen, be classified after resulting metaling, regenerated coarse aggregate partial size be 5~15mm rubble, apparent density 2289~
2631kg/m3, crush index 15.0-19.0%, moisture content is 0.98~1.53%, and water absorption rate is 3.40~4.10%.
Regeneration brick aggregate is taken from the material of brick in building waste, and regeneration brick aggregate itself has porosity, and regenerates thick bone
Material and natural coarse aggregate key difference be regenerated coarse aggregate surface be wrapped in one layer it is loose porous and be difficult to the old mortar peeled off,
The porosity of the two provides good environment of living away from home for selfreparing microorganism, makes it as concrete-brick mixing selfreparing coagulation
Native carrier provides good environment.Regeneration brick aggregate size is 5~15mm, 2150~2390kg/m of apparent density3, crushing refers to
32.0~42.0% are designated as, moisture content is 1.90~3.18%, and water absorption rate is 14.11~16.31%.
The principle of the present invention are as follows:
Micro-organisms bacillus, which passes through, forms precipitation of calcium carbonate realization reparation at gemma under aerobic environment.Along with carbonate
Transformation (the CO of balance2To HCO3 -And CO3 2-), the calcium ion in concrete medium reacts with carbanion, thus to micro-
Assemble to form insoluble calcium carbonate CaCO at biological gemma3Deposit makes crack self-healing and achievees the purpose that reparation.Its mineralising
Process is that aerobic respiration metabolism substrate generates CO2, with the OH in solution-Reaction generates HCO3 -, then under alkaline condition with water
Ca in mud2+The reaction was continued generates CaCO3Crystal.
Product and method in order to enable those skilled in the art to better understand the present invention, illustrate to prepare with embodiment below
Journey.Simultaneously compared with comparative example, to illustrate advantages of the present invention.
If not otherwise specified, the equipment that the present invention uses is this field conventional equipment.
If not otherwise specified, the material that the present invention uses is commercially available.
Embodiment one:
The present embodiment the following steps are included:
Regenerated coarse aggregate and regeneration brick aggregate are derived from civilian or commercial building rubbish:
(1) regenerated coarse aggregate and regeneration brick aggregate are the metaling and brickbat material broken off by jaw crusher, screening
Partial size is 5~15mm；
(2) Bacillus pasteurii is purchased from Shaanxi Institute of Microbiology, and microbial bacteria liquid culture medium is according to conventional culture
Method is cultivated, pH value 7, shake culture 12h, before vacuum impregnation (0~-4 DEG C) of low temperature place 12 hours after, bacterium solution dilution
It is 1.3 to OD value, the concentration of Bacillus pasteurii is 1010cell/mL.Microbial bacteria liquid culture medium is by organic protein and carbonic acid
Sodium solution and sodium bicarbonate solution mix, and the mass ratio of organic protein and inorganic sodium and water is 7%~9%, carbonic acid
The mass ratio of sodium solution and sodium bicarbonate solution and organic protein is 12.5%~20%, and the Baume degrees of sodium carbonate liquor is 18
~45 ° of B é.
(3) in step (2), regenerated coarse aggregate and regeneration brick aggregate separately carry out microorganism vacuum impregnation.It first will regeneration
Vacuum impregnation tank is added in coarse aggregate, then bacterium solution is added, and the quality of bacterium solution accounts for the 0.065% of regenerated coarse aggregate, and concussion shakes up 5 points
Clock.Another vacuum impregnation tank is added in regeneration brick aggregate, then bacterium solution is added, and the quality of bacterium solution accounts for the 0.085% of regeneration brick aggregate,
Concussion shakes up 5 minutes；In step (2), it is added after bacterium solution vibrates and shake up and be allowed to be evenly distributed on aggregate surface, impregnated of carrier
Regenerated coarse aggregate negative pressure of vacuum be 0.6Mpa under the conditions of adsorb 45min, impregnated of carrier regeneration brick aggregate in negative pressure of vacuum
To adsorb 35min under the conditions of 0.6Mpa.
(4) aggregate after vacuum suction is dried for 24 hours under the conditions of 40 DEG C to constant weight.
(5) be the water of 0.41:1.00:1.14:2.90 by mass ratio, cement, sand, stone regenerate concrete-brick with selfreparing and mixes
Material carries out mixing mixing, and concrete-brick mixing self-repair concrete is obtained after the completion of conserving.After conversion, selfreparing regenerates concrete-brick
The total volume volume of mixture accounts for the 30% of self-repair concrete, and wherein both regenerated coarse aggregate and regeneration brick aggregate add volume
Than for 4:1.Cement is PO42.5 grades of portland cements, density 3100kg/m3；Regenerated coarse aggregate partial size is the broken of 5~15mm
Stone, apparent density 2458kg/m3, crush index 17.0%, moisture content 1.33%, water absorption rate 3.83%；Regeneration brick bone
Material partial size is 5~15mm, apparent density 2339kg/m3, crush index 36.0%, moisture content 2.18%, water absorption rate is
14.29%；The fineness modulus of sand is 3.0~2.3, and average grain diameter is 0.23~0.50mm；Stone is rubble, 5~15mm of partial size, table
See 2378~2769kg/m of density3, crush index 11.0-13.0%, moisture content is 0.58~1.23%, water absorption rate 2.20
~3.10%.The calcium lactate for adding sand total mass fraction 2% during pouring stirring is mixed evenly in required water
It is added in the slurry mixed and stirred, sufficiently vibrates in casting process afterwards, with after-pouring in grinding tool.
As shown in figure 4, repairing product CaCO under electronic scanner microscope3Crystal is generated along at aggregate or mortar, grain
Biggish irregular crystal is generally presented in diameter, this illustrates that calcium mineralising reaction is good, and the reparation reaction being thus activated embodies bacterium
The high liveness of activity, and the little particle crystal generated show crack self-healing after still there is a small amount of reparation to react in lasting generation.
Embodiment two:
The present embodiment provides a kind of concrete in building waste-brick mixing selfreparing concrete, wherein water, cement, sand,
The mass ratio of stone is 0.41:1.00:1.14:2.94.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
Regeneration concrete-brick mixture total volume volume accounts for prepare raw material 15% of self-repair concrete again.
Embodiment three:
The present embodiment provides a kind of concrete in building waste-brick mixing selfreparing concrete, wherein water, cement, sand,
The mass ratio of stone is 0.41:1.00:1.14:2.80.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
Regeneration concrete-brick mixture total volume volume accounts for prepare raw material 45% of self-repair concrete again.
Example IV:
The present embodiment provides a kind of concrete in building waste-brick mixing selfreparing concrete, wherein water, cement, sand,
The mass ratio of stone is 0.41:1.00:1.10:2.54.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
Regeneration concrete-brick mixture total volume volume accounts for prepare raw material 0% of self-repair concrete again.
Embodiment five:
The concrete of the present embodiment-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；Difference exists
The concentration of Bacillus pasteurii in the microbial inoculum of dipping aggregate is 4010cell/mL。
Embodiment six:
The concrete of the present embodiment-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；Difference exists
The concentration of Bacillus pasteurii in the microbial inoculum of dipping aggregate is 8010cell/mL。
Comparative example one:
This comparative example provides a kind of concrete of the concrete in building waste-brick mixing selfreparing, wherein water, cement, sand
Mass ratio with stone is 0.41:1.00:1.12:2.52.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
The adding proportion for answering both regenerated coarse aggregate and selfreparing regeneration brick aggregate is 4:2.
Comparative example two:
This comparative example provides a kind of concrete of the concrete in building waste-brick mixing selfreparing, wherein water, cement, sand
Mass ratio with stone is 0.41:1.00:1.11:2.50.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
The adding proportion for answering both regenerated coarse aggregate and selfreparing regeneration brick aggregate is 4:3.
Comparative example three:
This comparative example provides a kind of concrete of the concrete in building waste-brick mixing selfreparing, wherein water, cement, sand
Mass ratio with stone is 0.41:1.00:1.14:2.54.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that reviewing one's lessons by oneself
The adding proportion for answering both regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1:1.
Comparative example four:
This comparative example provides a kind of concrete of the concrete in building waste-brick mixing selfreparing, wherein water, cement, sand
Mass ratio with stone is 0.41:1.00:1.10:2.54.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that regeneration
Coarse aggregate and regeneration brick aggregate do not carry out bacterium solution vacuum impregnation absorption.
Comparative example five:
This comparative example provides a kind of concrete of the concrete in building waste-brick mixing selfreparing, wherein water, cement, sand
Match ratio with stone is 0.41:1.00:1.00:2.50.
Above-mentioned concrete-brick mixing self-repair concrete preparation method is substantially the same manner as Example 1；The difference is that not mixing
Regeneration brick aggregate only carries out the dipping absorption of vacuum bacterium solution to regenerated coarse aggregate.
48h demoulding is stood after test specimen pouring molding in above-described embodiment and comparative example, at 85 ± 5%RH and 22 ± 2 DEG C
Under the conditions of conserve 7d after preset cracks.Crack is prefabricated using concrete sample as investigation object, according to specification GB/T50081-2002
" standard for test methods of mechanical properties of ordinary concrete ", with omnipotent pressure testing machine testing example, the compression strength of comparative example,
Specific method is to debug press machine to load with the rate of 0.04mm/min, while observing pleuroprosoposchisis seam by 150X crack observer
Development condition, and the fracture width carried out to four faces after the compression of each test specimen is measured record, when the side of test specimen goes out
The existing crack 0.3~0.5mm stops loading and unloading after holding lotus 90s, chooses fracture width after removing in each test specimen and is
3, the crack of 0.3~0.5mm is labeled；Subsequent test specimen sprinkling maintenance, it is micro- by 150X crack observer and electron scanning
Mirror (10000X) measures repairing performance.The reparation average value for being measured as 3 cracks of fracture width reparation value, as shown in table 1.
The XRD spectrum of microbe deposition product when Fig. 1 is vacuum impregnation regenerated coarse aggregate and regeneration brick aggregate；It is tied in Fig. 1
Fruit illustrates to produce a variety of CaCO after concrete-brick mixing self-repair concrete of microbial-dipping is repaired3Based products.
Fig. 2 be with period microbial mineralization self-repair concrete crack repairing effect comparison diagram, it is from left to right right respectively
Answer embodiment one to six.Result in Fig. 2 illustrates that the reparation crack effect in embodiment one is optimal.
Fig. 3 is the regenerated coarse aggregate of different addition quantity and the crack developing schematic diagram of regeneration brick aggregate test specimen, the result in Fig. 3
It is demonstrated by the crack occurrence form of different aggregate substitution rate test specimens.
1 concrete of table-brick mixing self-repair concrete reparation value and compressive strength determination
As shown in table 1, the present invention by be comprehensively compared 11 experimental programs different number of days fracture width reparation value and
Compression strength value discovery always substitutes coarse aggregate in construction refuse regenerated coarse aggregate and regeneration brick aggregate according to one method of embodiment
30%, regenerated coarse aggregate and regeneration brick aggregate are mixed than both there is quick crack to repair rate under conditions of 4:1, are provided simultaneously with
Good compression strength, comprehensive benefit is best, has high practicability and economy.
In above-listed embodiment, the object, technical solutions and advantages of the present invention are further described in detail, institute
It should be noted that the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all of the invention
Within spirit and principle, made any modifications, equivalent replacements, and improvements etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of building waste concrete-brick mixing self-repair concrete, which is characterized in that the self-repair concrete prepares raw material
Concrete-brick mixture is regenerated including concrete and selfreparing, by volume percentage, selfreparing regeneration concrete-brick mixture is accounted for and reviewed one's lessons by oneself
The 15%~45% of multiple concrete；
The selfreparing regeneration concrete-brick mixture is the mixture of selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate,
The volume ratio of selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1~4:1~3；
The selfreparing regenerated coarse aggregate is made of regenerated coarse aggregate dipping Bacillus pasteurii bacterium solution, and the selfreparing is again
Raw brick aggregate is made of regeneration brick aggregate dipping Bacillus pasteurii bacterium solution；
The OD value of Bacillus pasteurii bacterium solution is 1~1.3；By mass percentage, the quality volume of Bacillus pasteurii bacterium solution
The 0.065% of regenerated coarse aggregate is accounted for, the quality volume of Bacillus pasteurii bacterium solution accounts for the 0.085% of brick aggregate.
2. building waste concrete according to claim 1-brick mixing self-repair concrete, which is characterized in that press volume basis
Than meter, selfreparing regeneration concrete-brick mixture accounts for the 30% of self-repair concrete.
3. building waste concrete according to claim 1 or 2-brick mixing self-repair concrete, which is characterized in that the leaching
The process of stain Bacillus pasteurii bacterium solution are as follows: regenerated coarse aggregate impregnates Bacillus pasteurii bacterium under the conditions of negative pressure of vacuum 0.6Mpa
Liquid 45min, regeneration brick aggregate impregnate Bacillus pasteurii bacterium solution 35min under the conditions of negative pressure of vacuum 0.6Mpa.
4. building waste concrete according to claim 1 or 2-brick mixing self-repair concrete, which is characterized in that it is described again
Raw coarse aggregate is the metaling that concrete construction rubbish is formed after crushing；Regenerated coarse aggregate partial size is the rubble of 5~15mm, table
See 2289~2631kg/m of density3, crush index 15.0-19.0%, moisture content is 0.98~1.53%, water absorption rate 3.40
~4.10%；
The regeneration brick aggregate is the fragment of the material of brick in building waste, and regeneration brick aggregate size is 5~15mm, apparent density
2150~2390kg/m3, crush index be 32.0~42.0%, moisture content be 1.90~3.18%, water absorption rate be 14.11~
16.31%.
5. building waste concrete according to claim 1 or 2-brick mixing self-repair concrete, which is characterized in that in mass ratio
Meter, the concrete batching are water: cement: sand: stone=0.39~0.42:1.00~1.20:1.10~1.20:2.50~
3.10。
6. building waste concrete according to claim 5-brick mixing self-repair concrete, which is characterized in that the cement
For PO42.5 grades of portland cements, density 3100kg/m3；The fineness modulus of the sand is 3.0~2.3, partial size 0.23
~0.50mm；The stone is rubble, 5~15mm of partial size, 2378~2769kg/m of apparent density3, crush index 11.0-
13.0%, moisture content is 0.58~1.23%, and water absorption rate is 2.20~3.10%；
7. a kind of building waste concrete-brick mixing self-repair concrete preparation method, which is characterized in that the self-repair concrete
Prepare raw material include concrete and selfreparing regeneration concrete-brick mixture, press volume percentage, selfreparing regenerate concrete-brick mix
It closes material and accounts for the 15%~45% of self-repair concrete；The selfreparing regeneration concrete-brick mixture is selfreparing regenerated coarse aggregate
With the mixture of selfreparing regeneration brick aggregate, the volume ratio of selfreparing regenerated coarse aggregate and selfreparing regeneration brick aggregate is 1~4:1
~3；The OD value of Bacillus pasteurii bacterium solution is 1~1.3, by mass percentage, the quality volume of Bacillus pasteurii bacterium solution
The 0.065% of regenerated coarse aggregate is accounted for, the quality volume of Bacillus pasteurii bacterium solution accounts for the 0.085% of brick aggregate；
The selfreparing regenerated coarse aggregate is made of regenerated coarse aggregate dipping Bacillus pasteurii bacterium solution, and the selfreparing is again
Raw brick aggregate is made of regeneration brick aggregate dipping Bacillus pasteurii bacterium solution；Impregnate the process of Bacillus pasteurii bacterium solution are as follows: again
Raw coarse aggregate impregnates Bacillus pasteurii bacterium solution 45min under the conditions of negative pressure of vacuum 0.6Mpa, and regeneration brick aggregate is in negative pressure of vacuum
Bacillus pasteurii bacterium solution 35min is impregnated under the conditions of 0.6Mpa.
Concrete is mixed with selfreparing regeneration concrete-brick mixture and is mixed and stirred up to building waste concrete-brick mixing self-repair concrete.
8. building waste concrete according to claim 7-brick mixing self-repair concrete preparation method, which is characterized in that
By volume percentage, selfreparing regeneration concrete-brick mixture accounts for the 30% of self-repair concrete.
9. building waste concrete according to claim 7 or 8-brick mixing self-repair concrete preparation method, feature exist
In counting in mass ratio, the ingredient mass ratio of the concrete is water: cement: sand: stone=0.39~0.42:1.00~1.20:
1.10~1.20:2.50~3.10；
The cement is PO42.5 grades of portland cements, density 3100kg/m3；The fineness modulus of the sand be 3.0~
2.3, partial size is 0.23~0.50mm；The stone is rubble, and 5~15mm of partial size, density is 2500~2700kg/m3。
10. building waste concrete according to claim 7 or 8-brick mixing self-repair concrete preparation method, feature exist
In the regenerated coarse aggregate is the metaling that concrete construction rubbish is formed after crushing；Regenerated coarse aggregate partial size be 5~
The rubble of 15mm, 2289~2631kg/m of apparent density3, crush index 15.0-19.0%, moisture content be 0.98~
1.53%, water absorption rate is 3.40~4.10%；
The regeneration brick aggregate is the fragment of the material of brick in building waste, and regeneration brick aggregate size is 5~15mm, apparent density
2150~2390kg/m3, crush index be 32.0~42.0%, moisture content be 1.90~3.18%, water absorption rate be 14.11~
16.31%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111072139A (en) * | 2019-12-19 | 2020-04-28 | 北京北华中清环境工程技术有限公司 | Preparation method of sulfur autotrophic denitrification biological brick and biological brick prepared by same |
| CN112142409A (en) * | 2020-09-27 | 2020-12-29 | 长安大学 | Microbial self-healing waterproof anti-permeability mortar and preparation method thereof |
| CN114315199A (en) * | 2022-01-18 | 2022-04-12 | 河北长力环保科技有限公司 | Preparation method for producing sandstone aggregate from construction waste |
| CN114751702A (en) * | 2022-05-10 | 2022-07-15 | 中建安装集团有限公司 | Self-repairing concrete based on renewable porous material and preparation method thereof |
| CN115448696A (en) * | 2022-09-06 | 2022-12-09 | 合肥埠里新型建材有限公司 | Preparation method of coal gangue ceramsite hollow brick |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05200392A (en) * | 1992-01-28 | 1993-08-10 | Mitsubishi Materials Corp | Carrier for microbe |
| CN107721225A (en) * | 2017-11-01 | 2018-02-23 | 青岛理工大学 | A kind of method that Performances of Recycled Aggregate of Existing is improved using bacillus H4 |
| WO2018064320A1 (en) * | 2016-09-30 | 2018-04-05 | Baker Hughes, A Ge Company, Llc | Biologically mediated precipitation of carbonates for use in oilfield applications |
| CN108706928A (en) * | 2018-05-30 | 2018-10-26 | 郑州大学 | A kind of brick concrete mixed regeneration coarse aggregate concrete and preparation method thereof |
| KR101973715B1 (en) * | 2018-03-20 | 2019-04-29 | 한국과학기술원 | Autogenous Crack Healing Concrete Composition Using Microorganism, And Method for Manufacturing the Same |
-
2019
- 2019-07-30 CN CN201910693198.9A patent/CN110451877B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05200392A (en) * | 1992-01-28 | 1993-08-10 | Mitsubishi Materials Corp | Carrier for microbe |
| WO2018064320A1 (en) * | 2016-09-30 | 2018-04-05 | Baker Hughes, A Ge Company, Llc | Biologically mediated precipitation of carbonates for use in oilfield applications |
| CN107721225A (en) * | 2017-11-01 | 2018-02-23 | 青岛理工大学 | A kind of method that Performances of Recycled Aggregate of Existing is improved using bacillus H4 |
| KR101973715B1 (en) * | 2018-03-20 | 2019-04-29 | 한국과학기술원 | Autogenous Crack Healing Concrete Composition Using Microorganism, And Method for Manufacturing the Same |
| CN108706928A (en) * | 2018-05-30 | 2018-10-26 | 郑州大学 | A kind of brick concrete mixed regeneration coarse aggregate concrete and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111072139A (en) * | 2019-12-19 | 2020-04-28 | 北京北华中清环境工程技术有限公司 | Preparation method of sulfur autotrophic denitrification biological brick and biological brick prepared by same |
| CN111072139B (en) * | 2019-12-19 | 2023-12-22 | 北京北控工业环境科技有限公司 | Preparation method of sulfur autotrophic denitrification biological brick and biological brick prepared by same |
| CN112142409A (en) * | 2020-09-27 | 2020-12-29 | 长安大学 | Microbial self-healing waterproof anti-permeability mortar and preparation method thereof |
| CN114315199A (en) * | 2022-01-18 | 2022-04-12 | 河北长力环保科技有限公司 | Preparation method for producing sandstone aggregate from construction waste |
| CN114751702A (en) * | 2022-05-10 | 2022-07-15 | 中建安装集团有限公司 | Self-repairing concrete based on renewable porous material and preparation method thereof |
| CN115448696A (en) * | 2022-09-06 | 2022-12-09 | 合肥埠里新型建材有限公司 | Preparation method of coal gangue ceramsite hollow brick |
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